diff --git a/src/index.css b/src/index.css
index 71856a91..5afc9f9c 100644
--- a/src/index.css
+++ b/src/index.css
@@ -635,6 +635,8 @@ body.mobile-sidebar-open {
   .pane.highlights .highlights-container {
     border: none;
     border-radius: 0;
+    flex: 1;
+    min-height: 0;
   }
   
   /* Bookmarks sidebar from left */